Mechanical Engineer, Thermal and Fluid Systems

<h2>What we’re building</h2> <p>The marine industry supports recreation, global commerce, and national defense. And yet it runs on technology that hasn't meaningfully changed in fifty years. Until now.<br><br>Arc is on a mission to electrify the marine industry. We're rethinking powertrains, software, and vessel designs from first principles. And we're already executing. We started with consumers to develop and harden our core technology. We’re now scaling production of our flagship model with new models and sectors on the horizon. Now we’re extending our platform to commercial applications, starting with tugs, ferries, and defense, with years worth of signed contracts and a pipeline that spans every vessel type on the water.</p> <p>The technology is proven, the momentum is building, and the opportunity is enormous. The marine industry is going electric and Arc is building the platform that powers it</p> <h2>Who we’re looking for</h2> <p>We're looking for someone fired up by the mission and ready to build. You'll thrive here if you move fast, take ownership, and care about the details.</p> <p>This is a full-time, on-site role at our Los Angeles headquarters.</p> <h2>What You'll Do</h2> <ul> <li>Owning thermal and fluid systems across the vessel, including cooling loops, pumps, plumbing, bilge, and ventilation</li> <li>Running structural and thermal analysis to size and validate components before they get built</li> <li>Collaborating with naval architects on hull-to-machinery integration, including packaging, weight and LCG, foundation loads, and appendage interfaces</li> <li>Releasing drawings, GD&T, BOMs, and specifications, and driving DFM/DFA with manufacturing and supply chain</li> <li>Building and executing test plans on the bench, at the dock, and on the water, then turning that data back into design changes</li> <li>Partnering with electrical and controls engineers to integrate Arc's powertrain into the vessel</li> <li>Supporting the design of marine propulsion and drivetrain systems, including shafting, couplings, mounts, seals, bearings, and steering hardware</li> <li>Supporting USCG and ABS compliance and evaluating suppliers for critical marine hardware</li> <li>Up to 15% travel</li> </ul> <h2>Minimum Qualifications</h2> <ul> <li>Bachelor's degree in Mechanical, Marine, Ocean, or Aerospace Engineering, Naval Architecture, or a related engineering discipline</li> <li>3+ years designing and releasing mechanical systems for production, ideally thermal, fluid, or structural systems on vessels or vehicles</li> <li>Experience owning a design through build, test, and iteration rather than handing it off at release</li> <li>Hands-on experience with structural and thermal analysis, including FEA and hand calculations</li> <li>Proficiency with 3D CAD (SolidWorks, NX, or CATIA), GD&T, and PDM/PLM workflows</li> <li>Ability to work hands-on in the shop and on the water, including occasional sea trials</li> <li>Ability to lift, push, and pull 50 lbs</li> <li>This position may require access to information controlled under U.S. export control laws and regulations, including the International Traffic in Arms Regulations (ITAR). Applicants must be a "U.S. person" as defined by ITAR (22 CFR §120.62), i.e., a U.S. citizen, U.S. national, lawful permanent resident, or protected individual (asylee or refugee).</li> </ul> <h2>Bonus Qualifications</h2> <ul> <li>Experience designing marine cooling, bilge, ventilation, or other commercial vessel systems</li> <li>Familiarity with USCG and ABS rules</li> <li>Experience with electric or hybrid marine propuls